... fan mainly consist of impeller,case,air inlet,adjusting door,transmission,motor,system integral pedestal.3.Blades ... motor;-Impeller is adjusted by the static and dynamic balancing test.-Backward blades-Water cooled bearing house- ... Performance 6.Production Technology:CNC Plasma Cutting MachineImpellers Annealing40T Dynamic Balancing AdjustingProducts in Assembly7. Certificate: ISO9001:20088. Export ...